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Dovator [93]
2 years ago
15

Dont need too do question A

Mathematics
1 answer:
Brut [27]2 years ago
8 0

Answer:

B- 6x(x+2)

C- 3x( x(squared) -3)

4x(squared) (7x+1)

Step-by-step explanation:

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Solve the system using elimination
Pie

Answer:

(x, y) = (3, 1)

Step-by-step explanation:

given the 2 equations

2x + 3y = 9 → (1)

x + 5y = 8 → (2)

multiplying (2) by - 2 then adding to (1) will eliminate the term in x

multiply (2) by - 2

- 2x - 10y = - 16 → (3)

add 1(1) and (3) term by term

(2x - 2x) + (3y - 10y) = (9 - 16)

- 7y = - 7 ( divide both sides by - 7 )

y = 1

Substitute y = 1 in either (1) or (2) and solve for x

(1) : 2x + 3 = 9 ( subtract 3 from both sides )

2x = 6 ( divide both sides by 2 )

x = 3

Solution is (3, 1 )


5 0
3 years ago
What 18% more than 200
djyliett [7]
Answer: 236

Explanation:

100% = 200
118% = x

-> x = (118 * 200) / 100

-> x = 236
3 0
3 years ago
Read 2 more answers
In a sample of 57 temperature readings taken from the freezer of a restaurant, the mean is 29.6 degrees and the population stand
Natalka [10]

Answer:

(29.14 ; 30.06)

Step-by-step explanation:

Given that'

Sample size (n) = 57

Mean (m) = 29.6

Population standard deviation (σ) = 2.7

Confidence interval = 80%

= (1 - 0.8) / 2 = 0.1

Mean ± z * σ/√n

Using the Z probability calculator : Z0. 1 = 1.28

Hence,

29.6 ± 1.28 * (2.7 / √57)

29.6 - (1.28 * 0.3576237) ; 29.6 + (1.28 * 0.3576237)

29.142241664 ; 30.057758336

(29.14 ; 30.06)

8 0
3 years ago
There are 4 cats in a street,Five more come . How many cats are in a street ?
stealth61 [152]

Answer:

9, but suddenly 2 of them get separate, 3 of them trempled by people and 4 others get kidnapped so, didn't have any cat in a street

6 0
3 years ago
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Four less than twice the square of x is 124. Which equation can be used to find the value of x?
tester [92]
2x^2-4=124 is the correct answer.
5 0
3 years ago
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